Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos conflitos começaram no Afeganistão?
 ###Tabelas: CREATE TABLE drivers_and_constructors (drivers_and_constructors_id AUTO_INCREMENT PRIMARY KEY, Entrant VARCHAR, Constructor VARCHAR, Chassis VARCHAR, Engine † VARCHAR, Tyre VARCHAR, Driver VARCHAR, Rounds VARCHAR) CREATE TABLE historical_casting (historical_casting_id AUTO_INCREMENT PRIMARY KEY, Role VARCHAR, D'Oyly Carte 1920 Tour VARCHAR, D'Oyly Carte 1930 Tour VARCHAR, D'Oyly Carte 1939 Tour VARCHAR, D'Oyly Carte 1945 Tour VARCHAR, D'Oyly Carte 1950 Tour VARCHAR) CREATE TABLE involvement_in_military_conflicts (involvement_in_military_conflicts_id AUTO_INCREMENT PRIMARY KEY, Start of conflict INT, End of conflict VARCHAR, Conflict VARCHAR, Continent VARCHAR, Location VARCHAR, Branches involved VARCHAR) CREATE TABLE list_of_deputy_prime_ministers_of_spain (list_of_deputy_prime_ministers_of_spain_id AUTO_INCREMENT PRIMARY KEY, Deputy Prime Minister VARCHAR, Took office INT, Left office VARCHAR, Prime Minister VARCHAR, Term VARCHAR, Party VARCHAR) CREATE TABLE list_of_boxing_quintuple_or_five_division_champions_—_major_titles (list_of_boxing_quintuple_or_five_division_champions_—_major_titles_id AUTO_INCREMENT PRIMARY KEY, Number INT, Name VARCHAR, Titles VARCHAR, Date VARCHAR, Opponent VARCHAR, Result VARCHAR, Defenses INT)  
SELECT COUNT Start of conflict FROM involvement_in_military_conflicts WHERE Location = Afghanistan